<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>box sizing</title>
		<style type="text/css">
			div.c1{
				height: 299px;
				width: 400px;
				border: 24px blue groove;
				margin: 5px;
				padding: 50px;
				box-sizing: content-box;
			}
			div.c2{
				height: 299px;
				width: 400px;
				border: 24px blue groove;
				margin: 5px;
				padding: 50px;
				box-sizing: border-box;
			}
		</style>
	</head>
	<body>
		<div class="c1">11</div>
		<div class="c2">222</div>
	</body>
</html>
